UE-specific beam mapping with reference weight vectors

Methods, apparatuses, and computer program products are described for a user equipment in a wireless communication system with a plurality of user equipment where reference weight vectors orthogonal to each other are selected from a predefined set of directions for reference beams. The inner products of a UE-specific beam weight vector with all reference weight vectors is performed and UE-specific beams are mapped to the set of reference beams. From the set of reference beams, based on the reference beam with largest magnitude of inner product, the direction of the user equipment is determined. Based on that determined direction, the user equipment is instructed in to pair with another user equipment of the plurality.